Garmin GMA 347 - Manual (Page 11)

Garmin GMA 347 Pilot’s Guide 190-00325-00 Rev. B
9
Operation
Pressing the PLAY key plays back the most
recent message. Pressing the PLAY key again
stops that message and skips to the next preced-
ing message. The MKR/MUTE key cancels the
playback. In Split COM mode, the pilot’s or the copilot’s COM
audio is recorded and played back to the selected headset.
Transceivers
NOTE: Audio level is controlled by the selected COM
radio volume control.
Pressing COM1 MIC, COM2 MIC, or COM3 MIC key
selects the transmitter and receiver audio for the
selected transceiver source. The active com audio
is always heard on the headphones.
Also, each audio source can be selected
independently by pressing the COM1, COM2 or
COM3 receiver keys. When selected this way, they
remain active as audio sources regardless of which
transceiver has been selected for microphone use.
When a microphone is keyed, the active transceiver’s MIC
key LED blinks approximately once per second indicating that
the radio is transmitting.
Split Com and PA Mode
Pressing the COM 1/2 key activates the Split COM
mode. In this mode the pilot uses COM 1 for
MIC audio while the copilot uses COM 2. The
pilot and copilot can transmit simultaneously
over separate radios. The pilot can still listen to
COM 3, NAV 1, NAV 2, DME, ADF and MKR as
selected. The Split COM mode is cancelled by pressing the
COM 1/2 key a second time.
When in the Split COM mode the copilot may make
PA announcements while the pilot continues using COM 1
independently. PA mode is entered by pressing and holding the
SPKR key for two seconds while in the Split COM mode. The
copilot’s voice is then heard over the cabin speaker when keyed.
A second press of the
SPKR key returns the copilot to normal
Split COM operation.